20222012021 has 4 divisors (see below), whose sum is σ = 20274811392. Its totient is φ = 20169212652.

The previous prime is 20222011991. The next prime is 20222012071. The reversal of 20222012021 is 12021022202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20222012021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20222011987 and 20222012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222012071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26399111 + ... + 26399876.

It is an arithmetic number, because the mean of its divisors is an integer number (5068702848).

Almost surely, 2^20222012021 is an apocalyptic number.

It is an amenable number.

20222012021 is a deficient number, since it is larger than the sum of its proper divisors (52799371).

20222012021 is an equidigital number, since it uses as much as digits as its factorization.

20222012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52799370.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20222012021 its reverse (12021022202), we get a palindrome (32243034223).

The spelling of 20222012021 in words is "twenty billion, two hundred twenty-two million, twelve thousand, twenty-one".